PbrMYB186 activation of PbrF3H increased flavonol biosynthesis and promoted pollen tube growth in Pyrus.

This article explores the molecular mechanisms underlying pollen tube growth in pear trees. The researchers focused on the role of flavonoids, a group of plant secondary metabolites, in regulating pollen development and growth. They identified a specific gene, PbrF3H, that is involved in flavonoid biosynthesis and found that it is regulated by a transcription factor called PbrMYB186. Knockdown experiments showed that both PbrF3H and PbrMYB186 are essential for flavonoid production and pollen tube growth. The study provides insights into the regulatory network of flavonoids in pear pollen tubes. [Extracted from the article]